That's probably a stretch, Reinhard, to find anyone who is running WC on this hack.
But I think I read on MacRumors (or maybe it was reddit) that people were successful turning the clock back on the Mojave hack using an earlier Time Machine save, especially ones who had done a clean install before applying the patch. That MacRumors thread is several hundred pages long, probably worth a read before you give it a try.
If you can't find it, I'll take a look later this evening.